配置DHCPv6中继示例

配置DHCPv6中继示例

组网需求
如图1所示，DHCPv6服务器要为两个网段（fc00:1::/64和fc00:2::/64）的主机动态分配IPv6地址和DNS服务器的地址，且DHCPv6服务器与主机不在同一链路。SwitchA上fc00:1::1/64和fc00:2::1/64分别作为fc00:1::/64和fc00:2::/64网段主机的网关地址。
配置思路
在SwitchA上配置DHCPv6中继功能，通过转发DHCPv6服务器和主机之间的DHCPv6报文，以实现主机动态获取IPv6地址和DNS服务器的地址。
配置前请保证DHCPv6服务器与DNS服务器之间路由互通。
操作步骤
1、配置SwitchA作为DHCPv6中继
# 使能DHCP服务。
<HUAWEI> system-view
[HUAWEI] sysname SwitchA
[SwitchA] dhcp enable
# 配置接口GE1/0/1接口加入VLAN10，接口GE1/0/2接口加入VLAN20，接口GE1/0/3接口加入VLAN30。

[SwitchA] vlan batch 10 20 30
[SwitchA] interface gigabitethernet 1/0/1
[SwitchA-GigabitEthernet1/0/1] port link-type access
[SwitchA-GigabitEthernet1/0/1] port default vlan 10
[SwitchA-GigabitEthernet1/0/1] quit
[SwitchA] interface gigabitethernet 1/0/2
[SwitchA-GigabitEthernet1/0/2] port link-type trunk
[SwitchA-GigabitEthernet1/0/2] port trunk allow-pass vlan 20
[SwitchA-GigabitEthernet1/0/2] quit
[SwitchA] interface gigabitethernet 1/0/3
[SwitchA-GigabitEthernet1/0/3] port link-type access
[SwitchA-GigabitEthernet1/0/3] port default vlan 30
[SwitchA-GigabitEthernet1/0/3] quit
# 配置VLANIF接口的IPv6地址。
[SwitchA] ipv6
[SwitchA] interface vlanif 10
[SwitchA-Vlanif10] ipv6 enable
[SwitchA-Vlanif10] ipv6 address fc00:1::1 64
[SwitchA-Vlanif10] quit
[SwitchA] interface vlanif 20
[SwitchA-Vlanif20] ipv6 enable
[SwitchA-Vlanif20] ipv6 address fc00:3::1 64
[SwitchA-Vlanif20] quit
[SwitchA] interface vlanif 30
[SwitchA-Vlanif30] ipv6 enable
[SwitchA-Vlanif30] ipv6 address fc00:2::1 64
[SwitchA-Vlanif30] quit
# 使能DHCPv6中继功能。
[SwitchA] interface vlanif 10
[SwitchA-Vlanif10] dhcpv6 relay destination fc00:3::3
[SwitchA-Vlanif10] quit
[SwitchA] interface vlanif 30
[SwitchA-Vlanif30] dhcpv6 relay destination fc00:3::3
[SwitchA-Vlanif30] quit
# 配置SwitchA作为网关向主机发送RA消息的M和O标志位，实现主机通过DHCPv6方式获取IPv6地址。
[SwitchA] interface vlanif 10
[SwitchA-Vlanif10] undo ipv6 nd ra halt
[SwitchA-Vlanif10] ipv6 nd autoconfig managed-address-flag
[SwitchA-Vlanif10] ipv6 nd autoconfig other-flag
[SwitchA-Vlanif10] quit
[SwitchA] interface vlanif 30
[SwitchA-Vlanif30] undo ipv6 nd ra halt
[SwitchA-Vlanif30] ipv6 nd autoconfig managed-address-flag
[SwitchA-Vlanif30] ipv6 nd autoconfig other-flag
[SwitchA-Vlanif30] quit

2、配置SwitchB作为DHCPv6服务器

<HUAWEI> system-view
[HUAWEI] sysname SwitchB
[SwitchB] dhcp enable
[SwitchB] ipv6
[SwitchB] vlan 20
[SwitchB-vlan20] quit
[SwitchB] interface gigabitethernet 1/0/2
[SwitchB-GigabitEthernet1/0/2] port link-type trunk
[SwitchB-GigabitEthernet1/0/2] port trunk allow-pass vlan 20
[SwitchB-GigabitEthernet1/0/2] quit
[SwitchB] interface vlanif 20
[SwitchB-Vlanif20] ipv6 enable
[SwitchB-Vlanif20] ipv6 address fc00:3::3 64
[SwitchB-Vlanif20] quit
[SwitchB] dhcpv6 pool pool1
[SwitchB-dhcpv6-pool-pool1] address prefix fc00:1::/64  
[SwitchB-dhcpv6-pool-pool1] excluded-address fc00:1::1
[SwitchB-dhcpv6-pool-pool1] dns-server fc00:4::1
[SwitchB-dhcpv6-pool-pool1] quit
[SwitchB] dhcpv6 pool pool2
[SwitchB-dhcpv6-pool-pool2] address prefix fc00:2::/64  
[SwitchB-dhcpv6-pool-pool2] excluded-address fc00:2::1
[SwitchB-dhcpv6-pool-pool2] dns-server fc00:4::1
[SwitchB-dhcpv6-pool-pool2] quit
[SwitchB] ipv6 route-static :: 0 fc00:3::1

3、配置DHCPv6客户端（PC的操作系统以Windows 7为例）

（1）右击桌面“网络”，单击“属性”，进入“网络和共享中心”窗口。
（2）单击“本地连接”，进入“本地连接状态”窗口。
（3）单击“属性”，进入“本地链接属性”窗口。
（4）选择“Internet协议版本6（TCP/IPv6）”，点击“属性”，进入“Internet协议版本6（TCP/IPv6）属性”窗口，选择“自动获得IPv6地址”和“自动获得DNS服务器地址”，单击“确定”。

4、验证配置结果
# 在SwitchA上使用display dhcpv6 relay命令用来查看DHCPv6中继配置情况。

在SwitchB上使用display dhcpv6 pool命令查看DHCPv6地址池的配置信息。
[SwitchB] display dhcpv6 pool

# 分别在SwitchB上使用命令display dhcpv6 pool pool1 allocated address和display dhcpv6 pool pool2 allocated address查看DHCPv6地址池的IPv6地址分配情况。
[SwitchB] display dhcpv6 pool pool1 allocated address

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